aaishuu
01-14-2020, 03:04 AM
Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below.Fe2O3(s) + 2 Al(s) 2 Fe(l) + Al2O3(s)What masses of iron(III) oxide and aluminum must be used to produce 10.0 g iron?a) iron (III) oxideb)aluminiumc)What is the maximum mass of aluminum oxide that could be produced?I\'m going to show my calculations anyways Fe2O3(s) + 2 Al(s) -- 2 Fe (l) + Al2O3 (s) From the equation : 1 mole of iron (III) oxide 2 moles of aluminium -- 2 moles of iron 1 mole of aluminium oxide Given that iron = 10.0 g = 10.0 g / 55.8 g per mole = 0.179 mol of iron (corr to 3 sig fig) Because the mole ratio of iron to iron (III) oxide is 2 : 1 Therefore moles of iron (III) oxide produced = 0.179 / 2 = 0.0895 mol Convert it back to grams 0.0895 x (55.8 x 2 + 16.0 x 3) = 14.3 grams (corr to 3 sig fig)\' a) 14.3 grams of iron (III) oxide must be used ----- Given that iron = ...... (previously calculated) ...... = 0.179 mol of iron (corr to 3 sig fig) Because the mole ratio of iron to aluminium is 1 : 1 Therefore moles of aluminium produced = 0.179 mol Convert it back to grams 0.179 x 27.0 = 4.83 grams (corr to 3 sig fig) b) 4.83 grams of aluminium must be used ----- Given that iron = 0.179 mol Because the mole ratio of iron to aluminium oxide is 2 : 1 Therefore moles of Al2O3 produced = 0.179 / 2 = 0.0895 mol Convert it back to grams 0.0895 x (27.0 x 2 + 16.0 x 3) = 9.13 grams (corr to 3 sig fig) c) 9.13 grams of aluminium oxide is the maximum mass that could be produced P.S. The relative molecular masses used are from my textbooki\'m uncertain regardless of the incontrovertible fact that it must be relaxing, are you making thermite? i might guess which you would be able to artwork this out from the atomic weights of each, and taking the valencies under consideration - 2 aluminium atoms for 3 oxygen atoms. 2 iron atoms for 2 oxygen (a million:a million).Other related question